Round 3.989 to the nearest tenth. Answer:

Identify Tenths Place: Identify the digit in the tenths place. The digit to the right of the decimal point is called the tenths place. In 3.989, the digit in the tenths place is 9.Determine Rounding Direction: Look at the digit to the right of the tenths place. Determine whether we will round up or round down. The digit to the right of 9 in 3.989 is 8. Since 8 is greater than or equal to 5, we will round up.Round Up Tenths Place: Round up the tenths place digit. Since we are rounding up, the 9 in the tenths place will increase by 1, becoming 10. However, since the tenths place can only hold a single digit, this means we need to increase the digit in the ones place by 1 as well, changing the 3 to a 4. The number then becomes 4.0.

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Grade 4

Rounding: up to millions place

Full solution

Q. Round

3

989

to the nearest tenth.

\newline

Answer:

Identify Tenths Place: Identify the digit in the tenths place. $\newline$ The digit to the right of the decimal point is called the tenths place. In $3.989$ , the digit in the tenths place is $9$ .
Determine Rounding Direction: Look at the digit to the right of the tenths place. Determine whether we will round up or round down. The digit to the right of $9$ in $3.989$ is $8$ . Since $8$ is greater than or equal to $5$ , we will round up.
Round Up Tenths Place: Round up the tenths place digit. $\newline$ Since we are rounding up, the $9$ in the tenths place will increase by $1$ , becoming $10$ . However, since the tenths place can only hold a single digit, this means we need to increase the digit in the ones place by $1$ as well, changing the $3$ to a $4$ . The number then becomes $4.0$ .